Perimeter
P= a+b+c+d
Area
A= base times height over 2 times h
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Add the four sides.
2 * pi * r
4
They are both 4 sided quadrilaterals but a trapezoid has different properties than an isosceles trapezoid which has 2 equal base angles.
Surface Area = 1/2 x {times} the perimiter x {times}it by the the side length